Smartphones and feature phones are as common now as traditional landline phones were for decades. These handheld devices are so popular that many homes now only use mobile phones, increasingly pushing landline devices into the obsolete category. But while the popularity of mobile connectivity is vast today, it is still a very young technology when compared to its landline counterparts, which have been in existence since the mid-1800s.
To be clear, the history of the mobile phone focuses on...